Wrong eroding 3 pixels in seamlessclone

[Jinghui-Wang]

System information (version)

• OpenCV => 3.4
• Operating System / Platform => ❔
• Compiler => ❔

Detailed description

opencv/modules/photo/src/seamless_cloning_impl.cpp

Line 261 in c3e8a82

erode(binaryMask, binaryMask, Kernel, Point(-1,-1), 3);

It leads to undesired color propagation into the mask area, for the laplacian on the mask boarder to be used in poisson solver is same as the dst‘s. It's not consistent with the algorithm proposed in the paper, which directly uses the original mask to compute Laplacian.